The search service can find package by either name (apache),
provides(webserver), absolute file names (/usr/bin/apache),
binaries (gprof) or shared libraries (libXm.so.2) in
standard path. It does not support multiple arguments yet...

The System and Arch are optional added filters, for example
System could be "redhat", "redhat-7.2", "mandrake" or "gnome",
Arch could be "i386" or "src", etc. depending on your system.

System
Arch

RPM resource w3c-libwww

Libwww is a general-purpose Web API written in C for Unix and Windows (Win32).
With a highly extensible and layered API, it can accommodate many different
types of applications including clients, robots, etc. The purpose of libwww
is to provide a highly optimized HTTP sample implementation as well as other
Internet protocols and to serve as a testbed for protocol experiments.
See: http://www.w3.org/Consortium/Legal/copyright-software.html for
further information on its license.